package com.itheima.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.logging.LogRecord;

@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter{
    public static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest request=(HttpServletRequest) servletRequest;
        HttpServletResponse response=(HttpServletResponse) servletResponse;
        log.info("拦截到请求: {}",request.getRequestURI());
        String requestURI=request.getRequestURI();
        String []urls=new String[]{
         "/employee/login","/employee/logout","/backend/**","/common/**","/doc.html","/webjars/**",
                "/swagger-resources","/v2/api-docs","/user/sendMsg","/user/login","/front/**"
        };
        boolean check=check(requestURI,urls);
        if(check)
        {
            log.info("本次请求不需要处理");
            filterChain.doFilter(request,response);
            return ;
        }
        if(request.getSession().getAttribute("employee")!=null)
        {
            log.info("用户已登录,用户id为{}",request.getSession().getAttribute("employee"));
            Long empId=(Long)request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);
            filterChain.doFilter(request,response);
            return ;
        }
        if(request.getSession().getAttribute("user")!=null)
        {
            log.info("用户已登录,用户id为{}",request.getSession().getAttribute("user"));
            Long userId=(Long)request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);
            filterChain.doFilter(request,response);
            return ;
        }
        log.info("用户未登录");
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return ;
    }
    public boolean check(String requestURI,String []urls)
    {
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match) return true;
        }
        return false;
    }
}
